dnrops
/
gimp
mirror of https://github.com/GNOME/gimp.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
gimp/app/widgets/gimpcurveview.c

933 lines
25 KiB
C
Raw Blame History

/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include "libgimpmath/gimpmath.h"
#include "widgets-types.h"
#include "core/gimpcurve.h"
#include "core/gimpcurve-map.h"
#include "core/gimpmarshal.h"
#include "gimpcurveview.h"
enum
{
PROP_0,
PROP_BASE_LINE,
PROP_GRID_ROWS,
PROP_GRID_COLUMNS
};
static void gimp_curve_view_finalize (GObject *object);
static void gimp_curve_view_dispose (GObject *object);
static void gimp_curve_view_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec);
static void gimp_curve_view_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec);
static void gimp_curve_view_style_set (GtkWidget *widget,
GtkStyle *prev_style);
static gboolean gimp_curve_view_expose (GtkWidget *widget,
GdkEventExpose *event);
static gboolean gimp_curve_view_button_press (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_curve_view_button_release (GtkWidget *widget,
GdkEventButton *bevent);
static gboolean gimp_curve_view_motion_notify (GtkWidget *widget,
GdkEventMotion *bevent);
static gboolean gimp_curve_view_leave_notify (GtkWidget *widget,
GdkEventCrossing *cevent);
static gboolean gimp_curve_view_key_press (GtkWidget *widget,
GdkEventKey *kevent);
static void gimp_curve_view_set_cursor (GimpCurveView *view,
gdouble x,
gdouble y);
static void gimp_curve_view_unset_cursor (GimpCurveView *view);
G_DEFINE_TYPE (GimpCurveView, gimp_curve_view,
GIMP_TYPE_HISTOGRAM_VIEW)
#define parent_class gimp_curve_view_parent_class
static void
gimp_curve_view_class_init (GimpCurveViewClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = gimp_curve_view_finalize;
object_class->dispose = gimp_curve_view_dispose;
object_class->set_property = gimp_curve_view_set_property;
object_class->get_property = gimp_curve_view_get_property;
widget_class->style_set = gimp_curve_view_style_set;
widget_class->expose_event = gimp_curve_view_expose;
widget_class->button_press_event = gimp_curve_view_button_press;
widget_class->button_release_event = gimp_curve_view_button_release;
widget_class->motion_notify_event = gimp_curve_view_motion_notify;
widget_class->leave_notify_event = gimp_curve_view_leave_notify;
widget_class->key_press_event = gimp_curve_view_key_press;
g_object_class_install_property (object_class, PROP_BASE_LINE,
g_param_spec_boolean ("base-line",
NULL, NULL,
TRUE,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_GRID_ROWS,
g_param_spec_int ("grid-rows", NULL, NULL,
0, 100, 8,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
g_object_class_install_property (object_class, PROP_GRID_COLUMNS,
g_param_spec_int ("grid-columns", NULL, NULL,
0, 100, 8,
GIMP_PARAM_READWRITE |
G_PARAM_CONSTRUCT_ONLY));
}
static void
gimp_curve_view_init (GimpCurveView *view)
{
view->curve = NULL;
view->selected = 0;
view->last_x = 0.0;
view->last_y = 0.0;
view->cursor_type = -1;
view->xpos = -1.0;
view->cursor_x = -1.0;
view->cursor_y = -1.0;
GTK_WIDGET_SET_FLAGS (view, GTK_CAN_FOCUS);
gtk_widget_add_events (GTK_WIDGET (view),
GDK_BUTTON_PRESS_MASK |
GDK_BUTTON_RELEASE_MASK |
GDK_BUTTON1_MOTION_MASK |
GDK_POINTER_MOTION_MASK |
GDK_KEY_PRESS_MASK |
GDK_LEAVE_NOTIFY_MASK);
}
static void
gimp_curve_view_finalize (GObject *object)
{
GimpCurveView *view = GIMP_CURVE_VIEW (object);
if (view->xpos_layout)
{
g_object_unref (view->xpos_layout);
view->xpos_layout = NULL;
}
if (view->cursor_layout)
{
g_object_unref (view->cursor_layout);
view->cursor_layout = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_curve_view_dispose (GObject *object)
{
GimpCurveView *view = GIMP_CURVE_VIEW (object);
gimp_curve_view_set_curve (view, NULL);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gimp_curve_view_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GimpCurveView *view = GIMP_CURVE_VIEW (object);
switch (property_id)
{
case PROP_GRID_ROWS:
view->grid_rows = g_value_get_int (value);
break;
case PROP_GRID_COLUMNS:
view->grid_columns = g_value_get_int (value);
break;
case PROP_BASE_LINE:
view->draw_base_line = g_value_get_boolean (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_curve_view_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GimpCurveView *view = GIMP_CURVE_VIEW (object);
switch (property_id)
{
case PROP_GRID_ROWS:
g_value_set_int (value, view->grid_rows);
break;
case PROP_GRID_COLUMNS:
g_value_set_int (value, view->grid_columns);
break;
case PROP_BASE_LINE:
g_value_set_boolean (value, view->draw_base_line);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gimp_curve_view_style_set (GtkWidget *widget,
GtkStyle *prev_style)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
GTK_WIDGET_CLASS (parent_class)->style_set (widget, prev_style);
if (view->xpos_layout)
{
g_object_unref (view->xpos_layout);
view->xpos_layout = NULL;
}
if (view->cursor_layout)
{
g_object_unref (view->cursor_layout);
view->cursor_layout = NULL;
}
}
static void
gimp_curve_view_draw_grid (GimpCurveView *view,
GtkStyle *style,
cairo_t *cr,
gint width,
gint height,
gint border)
{
gint i;
gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]);
for (i = 1; i < view->grid_rows; i++)
{
gint y = i * height / view->grid_rows;
if ((view->grid_rows % 2) == 0 && (i == view->grid_rows / 2))
continue;
cairo_move_to (cr, border, border + y);
cairo_line_to (cr, border + width - 1, border + y);
}
for (i = 1; i < view->grid_columns; i++)
{
gint x = i * width / view->grid_columns;
if ((view->grid_columns % 2) == 0 && (i == view->grid_columns / 2))
continue;
cairo_move_to (cr, border + x, border);
cairo_line_to (cr, border + x, border + height - 1);
}
if (view->draw_base_line)
{
cairo_move_to (cr, border, border + height - 1);
cairo_line_to (cr, border + width - 1, border);
}
cairo_set_line_width (cr, 0.6);
cairo_stroke (cr);
if ((view->grid_rows % 2) == 0)
{
gint y = height / 2;
cairo_move_to (cr, border, border + y);
cairo_line_to (cr, border + width - 1, border + y);
}
if ((view->grid_columns % 2) == 0)
{
gint x = width / 2;
cairo_move_to (cr, border + x, border);
cairo_line_to (cr, border + x, border + height - 1);
}
cairo_set_line_width (cr, 1.0);
cairo_stroke (cr);
}
static void
gimp_curve_view_draw_point (GimpCurveView *view,
cairo_t *cr,
gint i,
gint width,
gint height,
gint border)
{
gdouble x, y;
gimp_curve_get_point (view->curve, i, &x, &y);
if (x < 0.0)
return;
y = 1.0 - y;
#define RADIUS 3
cairo_move_to (cr,
border + (gdouble) width * x + RADIUS,
border + (gdouble) height * y);
cairo_arc (cr,
border + (gdouble) width * x,
border + (gdouble) height * y,
RADIUS,
0, 2 * G_PI);
}
static gboolean
gimp_curve_view_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
GtkStyle *style = gtk_widget_get_style (widget);
cairo_t *cr;
gint border;
gint width;
gint height;
gdouble x, y;
gint i;
GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
if (! view->curve)
return FALSE;
border = GIMP_HISTOGRAM_VIEW (view)->border_width;
width = widget->allocation.width - 2 * border - 1;
height = widget->allocation.height - 2 * border - 1;
cr = gdk_cairo_create (gtk_widget_get_window (widget));
gdk_cairo_region (cr, event->region);
cairo_clip (cr);
cairo_translate (cr, 0.5, 0.5);
/* Draw the grid lines */
gimp_curve_view_draw_grid (view, style, cr, width, height, border);
/* Draw the curve */
gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]);
x = 0.0;
y = 1.0 - gimp_curve_map_value (view->curve, 0.0);
cairo_move_to (cr,
border + (gdouble) width * x,
border + (gdouble) height * y);
for (i = 1; i < 256; i++)
{
x = (gdouble) i / 255.0;
y = 1.0 - gimp_curve_map_value (view->curve, x);
cairo_line_to (cr,
border + (gdouble) width * x,
border + (gdouble) height * y);
}
cairo_stroke (cr);
if (gimp_curve_get_curve_type (view->curve) == GIMP_CURVE_SMOOTH)
{
gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]);
/* Draw the unselected points */
for (i = 0; i < view->curve->n_points; i++)
{
if (i == view->selected)
continue;
gimp_curve_view_draw_point (view, cr, i, width, height, border);
}
cairo_stroke (cr);
/* Draw the selected point */
if (view->selected != -1)
{
gimp_curve_view_draw_point (view, cr, view->selected,
width, height, border);
cairo_fill (cr);
}
}
if (view->xpos >= 0.0)
{
gint layout_x;
gint layout_y;
gchar buf[32];
gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]);
/* draw the color line */
cairo_move_to (cr,
border + ROUND ((gdouble) width * view->xpos),
border);
cairo_line_to (cr,
border + ROUND ((gdouble) width * view->xpos),
border + height - 1);
cairo_stroke (cr);
/* and xpos indicator */
g_snprintf (buf, sizeof (buf), "x:%d", (gint) (view->xpos * 255.999));
if (! view->xpos_layout)
view->xpos_layout = gtk_widget_create_pango_layout (widget, NULL);
pango_layout_set_text (view->xpos_layout, buf, -1);
pango_layout_get_pixel_size (view->xpos_layout, &layout_x, &layout_y);
if (view->xpos < 0.5)
layout_x = border;
else
layout_x = -(layout_x + border);
cairo_move_to (cr,
border + (gdouble) width * view->xpos + layout_x,
border + height - border - layout_y);
pango_cairo_show_layout (cr, view->xpos_layout);
cairo_fill (cr);
}
if (view->cursor_x >= 0.0 && view->cursor_x <= 1.0 &&
view->cursor_y >= 0.0 && view->cursor_y <= 1.0)
{
gchar buf[32];
gint w, h;
if (! view->cursor_layout)
{
view->cursor_layout = gtk_widget_create_pango_layout (widget,
"x:888 y:888");
pango_layout_get_pixel_extents (view->cursor_layout,
NULL, &view->cursor_rect);
}
x = border * 2 + 3;
y = border * 2 + 3;
w = view->cursor_rect.width;
h = view->cursor_rect.height;
cairo_push_group (cr);
gdk_cairo_set_source_color (cr, &style->text[GTK_STATE_NORMAL]);
cairo_rectangle (cr, x + 0.5, y + 0.5, w, h);
cairo_fill_preserve (cr);
cairo_set_line_width (cr, 6);
cairo_set_line_join (cr, CAIRO_LINE_JOIN_ROUND);
cairo_stroke (cr);
g_snprintf (buf, sizeof (buf), "x:%3d y:%3d",
(gint) (view->cursor_x * 255.999),
(gint) ((1.0 - view->cursor_y) * 255.999));
pango_layout_set_text (view->cursor_layout, buf, -1);
gdk_cairo_set_source_color (cr, &style->base[GTK_STATE_NORMAL]);
cairo_move_to (cr, x, y);
pango_cairo_show_layout (cr, view->cursor_layout);
cairo_fill (cr);
cairo_pop_group_to_source (cr);
cairo_paint_with_alpha (cr, 0.6);
}
cairo_destroy (cr);
return FALSE;
}
static void
set_cursor (GimpCurveView *view,
GdkCursorType new_cursor)
{
if (new_cursor != view->cursor_type)
{
GdkDisplay *display = gtk_widget_get_display (GTK_WIDGET (view));
GdkCursor *cursor = gdk_cursor_new_for_display (display, new_cursor);
gdk_window_set_cursor (gtk_widget_get_window (GTK_WIDGET (view)), cursor);
gdk_cursor_unref (cursor);
view->cursor_type = new_cursor;
}
}
static gboolean
gimp_curve_view_button_press (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
GimpCurve *curve = view->curve;
gint border;
gint width, height;
gdouble x;
gdouble y;
gint closest_point;
gint i;
if (! curve || bevent->button != 1)
return TRUE;
border = GIMP_HISTOGRAM_VIEW (view)->border_width;
width = widget->allocation.width - 2 * border;
height = widget->allocation.height - 2 * border;
x = (gdouble) (bevent->x - border) / (gdouble) width;
y = (gdouble) (bevent->y - border) / (gdouble) height;
x = CLAMP (x, 0.0, 1.0);
y = CLAMP (y, 0.0, 1.0);
closest_point = gimp_curve_get_closest_point (curve, x);
view->grabbed = TRUE;
set_cursor (view, GDK_TCROSS);
switch (gimp_curve_get_curve_type (curve))
{
case GIMP_CURVE_SMOOTH:
/* determine the leftmost and rightmost points */
view->leftmost = -1.0;
for (i = closest_point - 1; i >= 0; i--)
{
gdouble point_x;
gimp_curve_get_point (curve, i, &point_x, NULL);
if (point_x >= 0.0)
{
view->leftmost = point_x;
break;
}
}
view->rightmost = 2.0;
for (i = closest_point + 1; i < curve->n_points; i++)
{
gdouble point_x;
gimp_curve_get_point (curve, i, &point_x, NULL);
if (point_x >= 0.0)
{
view->rightmost = point_x;
break;
}
}
gimp_curve_view_set_selected (view, closest_point);
gimp_curve_set_point (curve, view->selected, x, 1.0 - y);
break;
case GIMP_CURVE_FREE:
view->last_x = x;
view->last_y = y;
gimp_curve_set_curve (curve, x, 1.0 - y);
break;
}
if (! GTK_WIDGET_HAS_FOCUS (widget))
gtk_widget_grab_focus (widget);
return TRUE;
}
static gboolean
gimp_curve_view_button_release (GtkWidget *widget,
GdkEventButton *bevent)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
if (bevent->button != 1)
return TRUE;
view->grabbed = FALSE;
set_cursor (view, GDK_FLEUR);
return TRUE;
}
static gboolean
gimp_curve_view_motion_notify (GtkWidget *widget,
GdkEventMotion *mevent)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
GimpCurve *curve = view->curve;
GimpCursorType new_cursor = GDK_X_CURSOR;
gint border;
gint width, height;
gdouble x;
gdouble y;
gdouble point_x;
gint closest_point;
if (! curve)
return TRUE;
border = GIMP_HISTOGRAM_VIEW (view)->border_width;
width = widget->allocation.width - 2 * border;
height = widget->allocation.height - 2 * border;
x = (gdouble) (mevent->x - border) / (gdouble) width;
y = (gdouble) (mevent->y - border) / (gdouble) height;
x = CLAMP (x, 0.0, 1.0);
y = CLAMP (y, 0.0, 1.0);
closest_point = gimp_curve_get_closest_point (curve, x);
switch (gimp_curve_get_curve_type (curve))
{
case GIMP_CURVE_SMOOTH:
if (! view->grabbed) /* If no point is grabbed... */
{
gimp_curve_get_point (curve, closest_point, &point_x, NULL);
if (point_x >= 0.0)
new_cursor = GDK_FLEUR;
else
new_cursor = GDK_TCROSS;
}
else /* Else, drag the grabbed point */
{
new_cursor = GDK_TCROSS;
gimp_data_freeze (GIMP_DATA (curve));
gimp_curve_set_point (curve, view->selected, -1.0, -1.0);
if (x > view->leftmost && x < view->rightmost)
{
gint n_points = gimp_curve_get_n_points (curve);
closest_point = ROUND (x * (gdouble) (n_points - 1));
gimp_curve_get_point (curve, closest_point, &point_x, NULL);
if (point_x < 0.0)
gimp_curve_view_set_selected (view, closest_point);
gimp_curve_set_point (curve, view->selected, x, 1.0 - y);
}
gimp_data_thaw (GIMP_DATA (curve));
}
break;
case GIMP_CURVE_FREE:
if (view->grabbed)
{
gint n_samples = gimp_curve_get_n_samples (curve);
gdouble x1, x2;
gdouble y1, y2;
if (view->last_x > x)
{
x1 = x;
x2 = view->last_x;
y1 = y;
y2 = view->last_y;
}
else
{
x1 = view->last_x;
x2 = x;
y1 = view->last_y;
y2 = y;
}
if (x2 != x1)
{
gint from = ROUND (x1 * (gdouble) (n_samples - 1));
gint to = ROUND (x2 * (gdouble) (n_samples - 1));
gint i;
gimp_data_freeze (GIMP_DATA (curve));
for (i = from; i <= to; i++)
{
gdouble xpos = (gdouble) i / (gdouble) (n_samples - 1);
gdouble ypos = (y1 + ((y2 - y1) * (xpos - x1)) / (x2 - x1));
gimp_curve_set_curve (curve, xpos, 1.0 - ypos);
}
gimp_data_thaw (GIMP_DATA (curve));
}
else
{
gimp_curve_set_curve (curve, x, 1.0 - y);
}
view->last_x = x;
view->last_y = y;
}
if (mevent->state & GDK_BUTTON1_MASK)
new_cursor = GDK_TCROSS;
else
new_cursor = GDK_PENCIL;
break;
}
set_cursor (view, new_cursor);
gimp_curve_view_set_cursor (view, x, y);
return TRUE;
}
static gboolean
gimp_curve_view_leave_notify (GtkWidget *widget,
GdkEventCrossing *cevent)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
gimp_curve_view_unset_cursor (view);
return TRUE;
}
static gboolean
gimp_curve_view_key_press (GtkWidget *widget,
GdkEventKey *kevent)
{
GimpCurveView *view = GIMP_CURVE_VIEW (widget);
GimpCurve *curve = view->curve;
gint i = view->selected;
gdouble x, y;
gboolean retval = FALSE;
if (view->grabbed || ! curve ||
gimp_curve_get_curve_type (curve) == GIMP_CURVE_FREE)
return FALSE;
gimp_curve_get_point (curve, i, NULL, &y);
switch (kevent->keyval)
{
case GDK_Left:
for (i = i - 1; i >= 0 && ! retval; i--)
{
gimp_curve_get_point (curve, i, &x, NULL);
if (x >= 0.0)
{
gimp_curve_view_set_selected (view, i);
retval = TRUE;
}
}
break;
case GDK_Right:
for (i = i + 1; i < curve->n_points && ! retval; i++)
{
gimp_curve_get_point (curve, i, &x, NULL);
if (x >= 0.0)
{
gimp_curve_view_set_selected (view, i);
retval = TRUE;
}
}
break;
case GDK_Up:
if (y < 1.0)
{
y = y + (kevent->state & GDK_SHIFT_MASK ?
(16.0 / 255.0) : (1.0 / 255.0));
gimp_curve_move_point (curve, i, CLAMP (y, 0.0, 1.0));
retval = TRUE;
}
break;
case GDK_Down:
if (y > 0)
{
y = y - (kevent->state & GDK_SHIFT_MASK ?
(16.0 / 255.0) : (1.0 / 255.0));
gimp_curve_move_point (curve, i, CLAMP (y, 0.0, 1.0));
retval = TRUE;
}
break;
default:
break;
}
if (retval)
set_cursor (view, GDK_TCROSS);
return retval;
}
GtkWidget *
gimp_curve_view_new (void)
{
return g_object_new (GIMP_TYPE_CURVE_VIEW, NULL);
}
static void
gimp_curve_view_curve_dirty (GimpCurve *curve,
GimpCurveView *view)
{
gtk_widget_queue_draw (GTK_WIDGET (view));
}
void
gimp_curve_view_set_curve (GimpCurveView *view,
GimpCurve *curve)
{
g_return_if_fail (GIMP_IS_CURVE_VIEW (view));
g_return_if_fail (curve == NULL || GIMP_IS_CURVE (curve));
if (view->curve == curve)
return;
if (view->curve)
{
g_signal_handlers_disconnect_by_func (view->curve,
gimp_curve_view_curve_dirty,
view);
g_object_unref (view->curve);
}
view->curve = curve;
if (view->curve)
{
g_object_ref (view->curve);
g_signal_connect (view->curve, "dirty",
G_CALLBACK (gimp_curve_view_curve_dirty),
view);
}
}
GimpCurve *
gimp_curve_view_get_curve (GimpCurveView *view)
{
g_return_val_if_fail (GIMP_IS_CURVE_VIEW (view), NULL);
return view->curve;
}
void
gimp_curve_view_set_selected (GimpCurveView *view,
gint selected)
{
g_return_if_fail (GIMP_IS_CURVE_VIEW (view));
view->selected = selected;
gtk_widget_queue_draw (GTK_WIDGET (view));
}
void
gimp_curve_view_set_xpos (GimpCurveView *view,
gdouble x)
{
g_return_if_fail (GIMP_IS_CURVE_VIEW (view));
view->xpos = x;
gtk_widget_queue_draw (GTK_WIDGET (view));
}
/* private functions */
static void
gimp_curve_view_set_cursor (GimpCurveView *view,
gdouble x,
gdouble y)
{
view->cursor_x = x;
view->cursor_y = y;
gtk_widget_queue_draw (GTK_WIDGET (view));
}
static void
gimp_curve_view_unset_cursor (GimpCurveView *view)
{
view->cursor_x = -1.0;
view->cursor_y = -1.0;
gtk_widget_queue_draw (GTK_WIDGET (view));
}
Reference in New Issue View Git Blame Copy Permalink